5.4 Server lockups

[Martin Hepworth]

David Proffitt wrote:
> Hello
> 
> I have a server running 5.4-RELEASE (its about 2 years old and was
> running fine until a few days ago)  
> 
> It runs ok for about 12 hours or so then locks up 
> It usually still responds to pings but connections to listening daemons
> (ssh and http) fail
> 
> If I try to login at the console I either find the server frozen or I
> can enter a username but then get no password prompt and have to resort
> to a power cycle
> 
> I never see any hardware errors in the logs
> 
> I'm begining to suspect the failure is conincidental with disc access or
> possibly with accessing one of two smbfs mounts but there's nothing to
> support either possibility in the logs
> 
> To establish whether it could be a disk problem I've tried running
> smartctl but the status always comes back OK although there are a lot of
> ECC Fast corrected errors (though all the posts I've read suggest this
> is not a concern)
> 
> I've moved the important functions to a backup server and will probably
> rebuild (installing 6.1) but I'd like to know if it really is a hardware
> problem? 
> 
> Any thoughts appreciated
> 
> David 
> 
> 
>  sudo smartctl -l error /dev/da0s1
> smartctl version 5.36 [i386-portbld-freebsd5.4] Copyright (C) 2002-6
> Bruce Allen
> Home page is http://smartmontools.sourceforge.net/
> 
> 
> Error counter log:
>            Errors Corrected by           Total   Correction
> Gigabytes    Total
>                ECC          rereads/    errors   algorithm
> processed    uncorrected
>            fast | delayed   rewrites  corrected  invocations   [10^9
> bytes]  errors
> read:   19211244        0         0  19211244   19211244      16995.827
> 0
> write:         0        0         0         0          0      62375.119
> 0
> verify:        0        0         0         0          0          0.000
> 0
> 
> Non-medium error count:       22
>  
>  
> 
> 
> 
> DAVID PROFFITT
> SYSTEMS ADMINISTRATOR
> 
> 200 GRAY'S INN ROAD
> LONDON
> WC1X 8XZ
> UNITED KINGDOM
> T +44 (0)20 7430 4705
> F 
> E DAVID.PROFFITT at ITN.CO.UK
> WWW.ITN.CO.UK
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Dave

multi-processor system and Kernel??

there's a known issue with this and high disk I/O. I know 5.3 (and 
previous) suffered from it but not sure about 5.4.

Not sure of the status os this problem either....

-- 
Martin Hepworth
Senior Systems Administrator
Solid State Logic
Tel: +44 (0)1865 842300

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